Paper machine winder



Feb. 24, 1970 w. K. voss ET AL 3,497,151

PAPER MACHINE WINDER Filed Aug. 14, 1968 2 Sheets-Sheet l INVENTOR. WILLIAM K. VOSS Attorney Feb. 24, 1970 w. K. voss ET AL PAPER MACHINE WINDER Filed Aug. 14, 1968 2 Sheets-Sheet 2 INVENTOR. WILLIAM voss Attorney United States Patent 3,497,151 PAPER MACHINE WINDER William Kennther Voss, St. Catharines, Ontario, Canada, assignor to The Ontario Paper Company Limited, Thorold, Ontario, Canada Filed Aug. 14, 1968, Ser. No. 752,606 Int. Cl. B65h 17/08 US. Cl. 242-66 2 Claims ABSTRACT OF THE DISCLOSURE Apparatus for regulating and controlling the forces to which a paper roll, particularly of large diameter, is subjected in the bearing zones in which the paper contacts the winder drums. A sealed pressure box is provided between the winder drums which exerts upward air pressure against the paper roll, the air pressure being increased as the paper roll increases in size and Weight.

This invention relates to the winding of paper in rolls and particularly to the winding of such rolls of large diameter. It provides a means and method of regulating and controlling forces to which the roll is subjected while it is being built, in the zones between the roll and the two winder drums. My invention enables the roll to be built with more uniform hardness and, especially in the case of large diameter rolls, so as to minimize or eliminate damage to the paper in the bearing zones in which the paper contacts the winder drums.

As the roll is built, its weight, for any given grade of paper, progressively increases, approximately and neglecting the effect of the core, proportionately to the square of the diameter. :It will be obvious that the forces in the bearing zones referred to above increase more and more rapidly as the roll diameter increases. In fact, when a roll diameter exceeds approximately 40-45 inches, these forces become critical, effecting paper damage and non-uniformity of roll winding.

A device for relieving pressure in the bearing zones (commonly called nip-relieving) may be used by lifting the ends of the core shaft. It is to be understood that each paper roll begins by winding consecutive plies on a hollow core or cores maintained in position in the valley between the winder drums at the start of the winding operation, the core or cores being mounted on a common core shaft. The core shaft protrudes beyond the end of the cores and nip-relieving means can be applied to bear a portion of the weight of the roll, provided the core diameter can accommodate a core shaft of sufficient diameter to avoid undue deflection across the width of the winder. It will be recognized that the core shaft diameter is limited by practical considerations. For example, a winder designed for winding a web of paper 360 inches width would require a 30 inch diameter core shaft to be capable of nip relieving without unacceptable deflection. Obviously, a core having such a diameter is not practical.

Thus, the problem facing the art has been that of providing means and methods for winding rolls of paper of a diameter in excess of about 40-45 inches without undue damage to the paper in the outer plies of such rolls.

Efforts have been made to solve this problem, for example, by the provision of duplex winders, but these have the disadvantage of an unacceptably long time cycle when used in association with high-speed paper machines.

My invention has for its object the control of nip pressure normally encountered in winding rolls of paper by providing air pads between the winding roll and one or both of the winder drums, that is, in the bearing zones referred to above. The method of providing air pads is to introduce a controlled flow of compressed air beice tween the nips formed by the paper roll and the drums. One method of providing such an air flow is to perforate the drum shells are provided within each shell a sealed pressure box with an arc movement programmed to maintain the position of the boxes at the bearing zones between paper and drums. Each pressure box is connected to a source of compressed air with pressure controlled to increase as the weight of the paper roll increases.

Referring to the drawings,

FIGURE 1 is a sectional view through a paper roll and supporting winder drums, showing the positions of the paper roll from commencement to completion or near completion.

FIGURE 2 is a view similar to FIGURE 1 at an intermediate stage of the roll construction.

FIGURE 3 is a view similar to FIGURE 1, at or near the final stage of roll construction.

FIGURE 4 is a vertical section of an end view taken on the line 44 of FIGURES 2 and 3.

Referring to the drawings, in which similar reference characters designate corresponding parts throughout. 101 indicates the web of paper coming from the parent reel (not shown) and passing over the tension controlling roll 102, from which the sheet 101 passes through the spaces between winder drums 103 and 104 and enters the hearing zone between winder drum 103 and core 105 shown in its initial position at 105a and is wound on the core 105, the winding of which is accomplished by the rotation in the directions indicated to the driven winder drums 103 and 104.

As the winding proceeds, the size of the paper roll increases, a core rising gradually and vertically from its initial position 105a to subsequent position designated 10511 and 1050, thus causing the paper roll to increase from its initial size 106a to the larger size 106b and 1066. As the paper roll increases in size, the bearing zones of contact between the paper roll and the winder drums 103 and 104 will progressively move from the initial position of zones designated 107a and 107b to new zones such as designated 108a and 108b, and later 109a and 1091: respectively.

It will also be recognized that, when the core is in its initial position at 105a no air pressure will be required, but that as the core ascends vertically toward a position where damage is likely to occur to the paper, as, for example, when it approaches the bearing zones 108a and 108b the air pressure will be required to be introduced and therefore increased in a predetermined manner. Programming of this type is well-known to those skilled in the art.

In order to overcome the difficulties and disadvantages hereinbefore referred to, I provide a pressure box 111. Pressure box 111 is positioned between winder drums 103 and 104 to form a sealed pressure zone. Longitudinal seals are shown at 112a and 112b. Circumferential seals on the end seals 118-are shown at 113a and 1131) (see FIGURE 4). Retractable end seals 114 (see FIGURES 2, 3 and 4) are placed in position at each end of the machine and are shown in operating position in full lines in FIGURE 4 and in retracted position in dotted lines. The seals are adapted to be retracted and placed in position by a slideable movement on track 116. As shown in FIGURE 4, track 116 is tapered in order that as the seal 114 is moved into operating position it will form an effective seal against loss of air pressure existing within the pressure zone.

The upper surface of the seal 114 is provided with a longitudinally elongated channel 115 into which is placed a gasket 11511 in order to more effectively prevent loss of air pressure above-mentioned. Compressed air is introduced into the pressure zone through the inlet 117.

Control of such air pressure can be programmed as indicated in connection with the embodiment shown in FIGURE 1 to allow for the progressive enlargement of the paper roll.

It is understood that the zone of air pressure extends from the pressure box 111 between the winder drums 103 and 104 and is sealed by means of seals 112a, 112b, 113a and 113b and gasket 115a.

In the embodiment shown in the FIGURES 1, 2 and 3, it will be apparent that the paper web 101 is introduced to winder drum 104 and that the air pressure is exerted against the under side of the paper roll throughout the entire region lying between the bearing zones in winder drums 103 and 104. As a consequence, for this effect the programming of the requisite air pressure must be designed to allow for the progressive enlargement of the paper roll.

Although specific embodiments of the invention have been described, it will be understood that various modifications may be made thereto without departing from the spirit thereof, the scope of which is set forth in the appended claims.

The embodiments of the invention in which an exclusive property and privilege is claimed are defined as follows:

1. Means for reguating and controlling the forces to which a paper roll is subjected, during the winding operation, in the zones between the roll and the Winder drums, comprising driven winder drums, a pressure box, seals at each outer end of the winder drums between said pressure box and said drums and a retractable seal adapted to be inserted, after the roll reaches a predetermined diameter, between the said drums and the underside of the paper roll to seal the zones between the said drums and the paper roll.

2. Means for regulating and controlling the forces to which a paper roll is subjected, during the winding operation in the zones between the roll and the winder drums, as caimed in claim 1, in which the retractable seal is provided with a pliable gasket at its points of contact with the paper roll.

References Cited UNITED STATES PATENTS 3,346,209 10/ 1967 Cronin 242-66 FOREIGN PATENTS 1,047,001 12/1958 Germany.

NATHAN L. MINTZ, Primary Examiner @333 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3 07 5 Dated Much 23, 1970 Inventofls) ll Kenneth v0 It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

lg the title change the name or the inventor from "William Kenther You" to reed "William Kenneth Voee".

Qn th time ghme change "W. K. Voee et al." to delete the "ct e1."

t on

Column 2 line 3 change "are provided" to read "and provide". Column 2 line 32 change "a core" to read "the core".

In the claims Claim 1 change reguating to read "regulating". Claim 2 line A change "coined" to read "cleiled".

Signed and sealed this 15th day of September- 1970.

(SEAL) Attest:

EDWARD M.F'LETCHER,JR, WILLIAM E. SCHUYLER, J3. Atteeting Officer Commissioner of Patents 

